CN211234850U

CN211234850U - Piston leak test frock

Info

Publication number: CN211234850U
Application number: CN201922413342.7U
Authority: CN
Inventors: 徐德坤
Original assignee: Changzhou Qingfeng Yikang Machinery Co ltd
Current assignee: Changzhou Qingfeng Yikang Machinery Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-11
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to the field of mechanical design, in particular to a piston leak test tool, which comprises a frame, a lifting cylinder, a pressing pipe, a sealing cover and a water tank; the upper portion of frame is equipped with the lift cylinder, be equipped with directly below the lift cylinder in the frame the water tank, the piston sets up in the water tank, press the pipe detachable connect in the piston rod of lift cylinder, press to dispose on the pipe the air inlet, press the pipe below to be equipped with and to seal the piston port sealed lid. The utility model discloses simple structure through this leak test frock, has made things convenient for the leak test to detect, has improved detection efficiency, has guaranteed product quality.

Description

Piston leak test frock

Technical Field

The utility model relates to the field of mechanical design, concretely relates to piston leak test frock.

Background

The piston is one of the main parts of the lifting cylinder product, and the parts must be fully sealed because the piston needs to be ventilated. However, the piston parts are castings, and the defects of loose structure, shrinkage cavity and the like are inevitably existed, if the defects cannot be eliminated, the piston can not be used due to air leakage, and therefore, the leakage test of each part is required to be carried out. The existing technology for detecting whether the piston leaks air can only adopt magnetic powder inspection, and the magnetic powder inspection principle is that a leakage magnetic field can be formed at a defect position by utilizing the fact that the magnetic permeability of the defect position of a workpiece is different from that of a normal position, so that magnetic powder at the defect position is attracted to form magnetic powder accumulation, and the defect position and the defect shape are shown under the proper illumination condition. Although most of the defective tiny magnetic powder can be detected, the defective tiny magnetic powder cannot visually display the shape, so that individual air-leaking pistons are missed in qualified products. Therefore, the utility model discloses a piston leak test frock is used for detecting whether the piston leaks gas.

SUMMERY OF THE UTILITY MODEL

To the technical problem who mentions in the above-mentioned background art, consequently, the utility model provides a piston leak test frock.

A piston leak test tool comprises a frame, a lifting cylinder, a pressure pipe, a sealing cover and a water tank; the upper portion of frame is equipped with the lift cylinder, be equipped with directly below the lift cylinder in the frame the water tank, the piston sets up in the water tank, press the pipe detachable connect in the piston rod of lift cylinder, press to dispose on the pipe the air inlet, press the pipe below to be equipped with and to seal the piston port sealed lid.

Preferably, the pressure pipe comprises a first connecting portion, a supporting portion and a second connecting portion, the first connecting portion is connected to the piston rod of the lifting cylinder through a nut, and the first connecting portion is connected to the second connecting portion arranged right below the first connecting portion through a plurality of supporting portions.

Preferably, the sealing cover is disposed on a lower end surface of the second connecting portion, and the air inlet is provided on the second connecting portion and extends to the lower end surface of the sealing cover.

Preferably, the upper end surface of the water tank is in an open shape, the edge of the piston port is arranged on the upper end surface of the water tank, a rubber gasket is sleeved on the edge of the piston port, and the rubber gasket is arranged on the upper end surface of the water tank.

Preferably, one side of the frame is provided with an air inlet control switch, and the air inlet control switch is communicated with the air inlet through a connecting pipe.

Preferably, a plurality of observation ports for observing the internal condition of the water tank are arranged around the water tank.

The utility model provides a piston leak test frock, beneficial effect lies in the utility model discloses whether the device is used for detecting the piston and leaks gas, will press down to the up end of water tank through the lift cylinder, sealed border department that the lid made piston port is sealed, in gaseous letting in the piston from air inlet department, if the piston is defective, in gaseous will getting into the water tank, whether there is the bubble to judge the piston defect according to the water in the water tank, through this leak test frock, made things convenient for the leak test to detect, improved detection efficiency, guaranteed product quality.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of the device of the present invention;

FIG. 2 is a schematic structural view of a middle pressure pipe of the device of the present invention;

FIG. 3 is a schematic view of a piston structure for detection in the present invention;

in the figure, 1, a frame; 11. a side plate; 12. an upper connecting plate; 13. a lower connecting plate; 2. a lifting cylinder; 3. pressing a pipe; 31. a first connection portion; 32. a support portion; 33. a second connecting portion; 4. a sealing cover; 5. a water tank; 51. a viewing port; 6. an air inlet; 7. a rubber gasket; 8. an air inlet control switch; 9. a connecting pipe; 10. a piston; 101. a piston port; 102. at the edge of the piston port; 11. the lifting cylinder controls the switch.

Detailed Description

This embodiment provides a piston leak test frock, a defect such as be used for detecting whether piston 10 organizes loosely, the shrinkage cavity, under lift cylinder control switch 11's effect, introduce lift cylinder 2 with gas through connecting pipe 9 in, press pipe 3 to push down to the up end of water tank 5, sealed lid 4 and piston port 101 compound die, make the inside confined space that forms of piston 10, it is gaseous to get into from air inlet 6, let in inside piston 10, if piston 10 is defective, gas in the piston 10 can be revealed to water tank 5 in, thereby it has the bubble to observe the water in the water tank 5 from viewing aperture 51 department.

As shown in figure 1, the piston leakage test tool comprises a frame 1, a lifting cylinder 2, a pressure pipe 3, a sealing cover 4 and a water tank 5. The frame 1 is made of wood materials and consists of two side plates 11, an upper connecting plate 12 and a lower connecting plate 13 which are connected between the two side plates. Be equipped with on the upper junction plate 11 of frame 1 lift cylinder 2, be equipped with directly below lift cylinder 2 be equipped with on the lower connecting plate 13 of frame 1 and be "drum" shape water tank 5, piston 10 sets up in the water tank 5, water has been put in the water tank 5, and the viewing aperture 51 that organic glass made is installed all around to water tank 5. Press pipe 3 detachable connect in lift cylinder 2's piston rod, press pipe 3 to go up to dispose air inlet 6, press pipe 3 below to be equipped with can seal piston port 101 sealed lid 4. Under the action of the lifting cylinder 2, the pressing pipe 3 moves downwards to the upper end face of the water tank 5, the sealing cover 4 and the piston port 101 are matched, a sealing space is formed inside the piston 10, gas enters from the gas inlet 6 and is introduced into the piston 10.

As shown in fig. 1 and 2, the pressure pipe 3 includes a first connecting portion 31, a supporting portion 32, and a second connecting portion 33, the first connecting portion 31 is connected to the piston rod of the lifting cylinder 2 by a nut, and the first connecting portion 31 is connected to the second connecting portion 33 disposed right below the first connecting portion 31 by a plurality of the supporting portions 32. The seal cover 4 is disposed on a lower end surface of the second connecting portion 33, and the air inlet 6 is provided on the second connecting portion 33 and extends to the lower end surface of the seal cover 4. The upper end face of the water tank 5 is open, the edge of the piston port 101 is arranged on the upper end face of the water tank 5, the edge of the piston port 101 is sleeved with a rubber gasket 7, the rubber gasket 7 is arranged on the upper end face of the water tank 5, the sealing cover 4 and the piston port 101 are further guaranteed to be matched, and a sealing space is formed inside the piston 10. When the pressing pipe 3 is pressed to the upper end surface of the water tank 5, the edge 102 of the piston port is pressed by the sealing cover 4, so that the gas in the piston 10 cannot leak from the edge 102 of the piston port, and the rubber gasket 7 further ensures that the sealing cover 4 and the edge 102 of the piston port are sealed.

As shown in fig. 1, an air inlet control switch 8 is disposed on one side of the frame 1, and the air inlet control switch 8 is communicated with the air inlet 6 through a connecting pipe 9. After the sealing cover 4 contacts the edge 102 of the piston port, the inlet control switch 8 is activated and gas is introduced into the interior of the piston 10 from the inlet port 6. A plurality of observation ports 51 for observing the internal condition of the water tank 5 are arranged around the water tank 5, and if the piston 10 is defect-free and gas in the piston 10 cannot leak into the water tank 5 from the inside of the piston 10, no bubbles are generated in the water tank 5; if the piston 10 is defective, the gas in the piston 10 leaks into the water tank 5, so that bubbles of water in the water tank 5 can be observed from the observation port 51.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A piston leak test tool is characterized by comprising a rack, a lifting cylinder, a pressure pipe, a sealing cover and a water tank;

the upper portion of frame is equipped with the lift cylinder, be equipped with directly below the lift cylinder in the frame the water tank, the piston sets up in the water tank, press the pipe detachable connect in the piston rod of lift cylinder, press to dispose the air inlet on the pipe, press the pipe below to be equipped with and to seal up the piston port sealed lid.

2. The piston leakage test tool according to claim 1, wherein the pressure pipe comprises a first connecting portion, a supporting portion and a second connecting portion, the first connecting portion is connected to a piston rod of the lifting cylinder through a nut, and the first connecting portion is connected to the second connecting portion arranged right below the first connecting portion through a plurality of supporting portions.

3. The piston leakage test tool according to claim 2, wherein the sealing cover is arranged on the lower end face of the second connecting portion, and the air inlet is formed in the second connecting portion and extends to the lower end face of the sealing cover.

4. The piston leak test tool according to claim 1, wherein the upper end surface of the water tank is open, the edge of the piston port is arranged on the upper end surface of the water tank, a rubber gasket is sleeved on the edge of the piston port, and the rubber gasket is arranged on the upper end surface of the water tank.

5. The piston leakage test tool according to claim 1, wherein an air inlet control switch is arranged on one side of the rack and is communicated with the air inlet through a connecting pipe.

6. The piston leak test tool according to claim 1, wherein a plurality of observation ports for observing the internal condition of the water tank are arranged around the water tank.